QuizCTAthletic TrainingIn performing progressive muscle relaxation, the athlete must first tense the muscles for _____ seconds, and then relax them for _____ seconds.
In performing progressive muscle relaxation, the athlete must first tense the muscles for _____ seconds, and then relax them for _____ seconds.
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.